Edit D:\app\Administrator\product\11.2.0\dbhome_1\sqldeveloper\ide\extensions\META-INF\editor-customization.xsd

<?xml version="1.0" encoding="US-ASCII" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns="http://xmlns.oracle.com/ide/customization"
            xmlns:ext="http://jcp.org/jsr/198/extension-manifest"
            targetNamespace="http://xmlns.oracle.com/ide/customization"
            elementFormDefault="qualified">
  <xsd:import schemaLocation="extension.xsd"
              namespace="http://jcp.org/jsr/198/extension-manifest"/>
  <xsd:element name="editor-customizations" type="editorCustomizationsType"
               substitutionGroup="ext:custom-hook">
    <xsd:annotation>
      <xsd:documentation>
        Customizes editors and the editor framework of the platform.
      </xsd:documentation>
    </xsd:annotation>
  </xsd:element>
  <xsd:complexType name="editorCustomizationsType">
    <xsd:complexContent>
      <xsd:extension base="ext:customHookType">
        <xsd:all>
          <xsd:element name="global-editor-prefs" minOccurs="0">
            <xsd:annotation>
              <xsd:documentation>
                Specifies global preferences for the editor framework.
              </xsd:documentation>
            </xsd:annotation>
            <xsd:complexType>
              <xsd:attribute name="tab-position" type="tabPositionType"
                             default="bottom">
                <xsd:annotation>
                  <xsd:documentation>
                    Specifies the location of editor tabs. Can be either 'top'
                    or 'bottom'.
                  </xsd:documentation>
                </xsd:annotation>
              </xsd:attribute>
              <xsd:attribute name="hide-tabs-if-single-editor"
                             type="xsd:boolean" default="false">
                <xsd:annotation>
                  <xsd:documentation>
                    If 'true', editor tabs will be hidden if there is only a
                    single editor for a given document. If 'false', editor tabs
                    will always be present. May only be 'true' if the value of
                    tab-position is 'top'.
                  </xsd:documentation>
                </xsd:annotation>
              </xsd:attribute>
              <xsd:attribute name="tabs-use-gradients" type="xsd:boolean"
                             default="false">
                <xsd:annotation>
                  <xsd:documentation>
                    If 'true', editor tabs are rendered with a gradient visual
                    style like dockable tabs. If 'false', editor tabs are
                    rendered in a flat visual style. Default is 'false'.
                  </xsd:documentation>
                </xsd:annotation>
              </xsd:attribute>
            </xsd:complexType>
          </xsd:element>
        </xsd:all>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
  <xsd:simpleType name="tabPositionType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="top">
        <xsd:annotation>
          <xsd:documentation>
            Indicates that tabs are at the top.
          </xsd:documentation>
        </xsd:annotation>
      </xsd:enumeration>
      <xsd:enumeration value="bottom">
        <xsd:annotation>
          <xsd:documentation>
            Indicates that tabs are at the bottom.
          </xsd:documentation>
        </xsd:annotation>
      </xsd:enumeration>
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>

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